feedback7 R22-LATE: 画卷 never puts the copied items on the copy — they are gained unequipped into the hand / temp like any item; golden: unchanged

PRTS 卫戍协议：盟约 PRTS盟约记录, 法术编纂集, 画卷 备注: 「选择策略<夕>时可获得<br>使用后销毁，获得的装备为未装备状态」.
Without a promotion the 画卷 handler still equipped every copied item that did not merge (an advanced item, a
变形同构体) onto the copy in the hand (the promotion case was fixed for #389). Now each copied item is only gained
(ctx.grantItem → acquireItem): the hand, overflow temp, and with both full it is destroyed with the usual toast
「整备区已满，获得的装备已销毁」, as for any gained item. A copied normal item that completes a pair still merges at once
(the golden in the hand), and the copy itself still follows the chess gain rules (a full hand and temp refuse the
scroll: HAND_FULL, the scroll kept). Full-hand check: a full hand with 3 free temp slots holds the copy and both
copied advanced items; with 2 free slots the copy and one item fit and the other is destroyed with the toast (before,
both rode on the copy).

Docs: META.md (Arts list), research/04-items.md (画卷 copy). The content test that pinned the old behaviour
(test/content/items.test.js: 变形同构体 "the copy wears it too") now expects it in the hand.
Tests: test/match/scroll-copy-merge.test.js +3 (no promotion, normal and elite targets with advanced items; the full
hand at 3 / 2 free temp slots) — all 3 fail on the parent; every test mentioning 画卷: 177 pass. Golden unchanged.

test/content/items.test.js

@@ -1121,10 +1121,11 @@ test('画卷 (Art): copies the operator on the tile / in front with its elite st
   const copy = ps.hand.find((p) => p && p.kind === 'chess');
   assert.equal(copy && copy.id, DATA.chess[cid].goldenId, 'elite copy in the hand');
   // the copied 激光发射器 pairs with the original's (items merge "无论是否被装备") ⇒ the golden goes to the hand;
-  // 变形同构体 never merges ⇒ the copy wears it too
-  assert.deepEqual(copy.items.map((x) => x.id), [A('6_09')]);
+  // 变形同构体 never merges ⇒ its copy waits in the hand too, unequipped (PRTS 画卷 备注 "获得的装备为未装备状态";
+  // until 0.2.2 the copy wore it)
+  assert.deepEqual(copy.items.map((x) => x.id), [], 'the copy wears nothing');
   assert.deepEqual(ps.find(target.uid).piece.items.map((x) => x.id), [A('6_09')]);
-  assert.deepEqual(handIds(ps, 'item'), [B('3_03')], 'merged golden in the hand (regression: was equipped on the copy)');
+  assert.deepEqual(handIds(ps, 'item').slice().sort(), [B('3_03'), A('6_09')].sort(), 'the merged golden and the copied 变形同构体 in the hand');
   const art2 = giveItem(m, ps, 'chess_item_6_02_m');
   assert.equal(m.handle('p_0', { t: 'g.art', itemUid: art2.uid, row: 11, col: 7 }).error, 'BAD_TARGET', 'no operator in range');
   cover('chess_item_6_02_m');